The concentration of reducing sugar in a solution can be determined by comparing an observational measurement with a standard. Which observational measurement could be used to estimate the concentration of reducing sugar in an unknown solution? 1 the colour of the solution after 20 minutes 2 the time taken for the first colour change to happen 3 the rate at which solid particles form
- A1, 2 and 3
- B1 and 2 only
- C2 only
- D3 only